Some mail does not get thru

[ollieman]

Im running FreeBSD with Sendmail. every week my company sends out an email to around 4000 people.

im not a v confident unix user but ive played about with sendmail.cf in the past and had some success. recently ive noticed that there is an increasing number of users complaining that have not been able to receive my emails. interestingly, most of them seem to be from a certain isp - another.com.

here is a typical output when i do a
#/usr/sbin/sendmail -q -v

this is a fragment of the output (subsitituting my domain with mydomain and the To: address to xxxx@another.com):

xxxx@another.com... Connecting to mx.another.com. via esmtp...
220 another.com Sendmail ready.
>>> EHLO mydomain.com
500 Syntax Error, command unrecognized
>>> HELO mydomain.com
250 another.com pleased to meet you, mydomain.com
>>> MAIL From:<nobody@mydomain.com>
250 sender is <nobody@mydomain.com>, sender OK
>>> RCPT To:<xxxx@another.com>
250 recipient <xxxx@another.com>, recipient OK
>>> DATA
354 OK End with <CRLF>.<CRLF>
>>> .
421 Service not available, closing transmission channel
>>> QUIT
xxxx@another.com... Connecting to dudley.another.com. via esmtp...
220 another.com Sendmail ready.
>>> EHLO mydomain.com
500 Syntax Error, command unrecognized
>>> HELO mydomain.com
250 another.com pleased to meet you, mydomain.com
>>> MAIL From:<nobody@mydomain.com>
250 sender is <nobody@mydomain.com>, sender OK
>>> RCPT To:<xxxx@another.com>
250 recipient <xxxx@another.com>, recipient OK
>>> DATA
354 OK End with <CRLF>.<CRLF>
>>> .
421 Service not available, closing transmission channel
>>> QUIT

another.com accounts for quite a large proportion of my clients and i would really like to get this working. ive tried emailing their customer help but (surprise, surprise) they havent responded.

thanks in advance for any info.

-ollie

 

[RhythmAce]

To avoid or at least cut down on spamming, some servers allow only a certain amount of bulk e-mail through their server. If you are using a list manager, try to cut down to say, 500 e-mails going to one server. If that doesn't work, try a small number like 50 or so and see if that works. If it does, then you know what ya gotta do. ) You'll still be able to send them all, just not at once.

 

[ollieman]

thanks for the response

do you know how long you have to wait between mails? is it a matter of hours or days?

thanks

-ollie

 

[RhythmAce]

I don't think you have to wait long at all. Theyjust can't be all in the same batch.